26990921208 has 32 divisors (see below), whose sum is σ = 67694290560. Its totient is φ = 8968042080.

The previous prime is 26990921201. The next prime is 26990921281. The reversal of 26990921208 is 80212909962.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26990921201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1800610 + ... + 1815537.

It is an arithmetic number, because the mean of its divisors is an integer number (2115446580).

Almost surely, 2^26990921208 is an apocalyptic number.

It is an amenable number.

26990921208 is an abundant number, since it is smaller than the sum of its proper divisors (40703369352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26990921208 is a wasteful number, since it uses less digits than its factorization.

26990921208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616467 (or 3616463 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 26990921208 in words is "twenty-six billion, nine hundred ninety million, nine hundred twenty-one thousand, two hundred eight".